Abstract: An intake manifold M1 includes: a surge tank 10, formed in an elongated tubular shape in a direction of a predetermined axis S; branch pipes 20, extending from the surge tank; an upstream tubular part 50, continuous on an upstream side of the surge tank; an opening part 60, open at an upstream end of the upstream tubular part; a flange part 70, formed around the opening part; an annular seal groove 80, formed at the flange part around the opening part; and fastening parts 90, formed at the flange part around the annular seal groove to fasten a throttle unit. A groove width of the annular seal groove 80 is formed to decrease in the vicinity of the fastening part.

Abstract: An intake manifold M1 includes: a surge tank 10, formed in an elongated tubular shape in a direction of a predetermined axis S; branch pipes 20, extending from the surge tank; an upstream tubular part 50, continuous on an upstream side of the surge tank; an opening part 60, open at an upstream end of the upstream tubular part; a flange part 70, formed around the opening part; an annular seal groove 80, formed at the flange part around the opening part; and fastening parts 90, formed at the flange part around the annular seal groove to fasten a throttle unit. A groove width of the annular seal groove 80 is formed to decrease in the vicinity of the fastening part.

Abstract: An air intake device offers simplified construction, reduced size, lowered cost, etc., while facilitating disposing of throttle body and driving part in intake air passage, allowing throttle body to be reliably held, and eliminating possible occurrence of intake air leakage, etc., thus positively securing the performance. The air intake device includes an actuator and an intake air manifold made of resin. In actuator, there are provided a throttle body, a throttle valve, a motor for opening/closing throttle valve, and a power transmission mechanism. Throttle valve and motor are positioned and held on one side of a support member, and power transmission mechanism is on the other side. In intake air manifold, a housing chamber is provided. When a fixing part of support member is jointed to a part to be fixed of intake air manifold, throttle body and motor are accommodated in a predetermined position in housing chamber.

Abstract: An air intake device offers simplified construction, reduced size, lowered cost, etc., while facilitating disposing of throttle body and driving part in intake air passage, allowing throttle body to be reliably held, and eliminating possible occurrence of intake air leakage, etc., thus positively securing the performance. The air intake device includes an actuator and an intake air manifold made of resin. In actuator, there are provided a throttle body, a throttle valve, a motor for opening/closing throttle valve, and a power transmission mechanism. Throttle valve and motor are positioned and held on one side of a support member, and power transmission mechanism is on the other side. In intake air manifold, a housing chamber is provided. When a fixing part of support member is jointed to a part to be fixed of intake air manifold, throttle body and motor are accommodated in a predetermined position in housing chamber.